Nut-lock



UNITED s STATES lPATENT FFICE.

JAMES B. MALCOM, OF ADOLPHUS, TENNESSEE.

NUT-1.00K.

sPncIFicTIoN forming pare of Letters Patent No. 821,688, dated Maren 21,1899.

Application i'lled July 15,1897. Serial N0. 644,595. (No model.)

To aLZZ whom, t may concern..- v

Be it known that I, JAMES B. MALCOM, of Adolphus, in the county ofLoudon and State of Tennessee, have invented certain new and usefulImprovements in Nut-Locks and I do hereby declare the following to be afull,-clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to new and useful improvements in nut-locks; and itconsists in the novel combination and arrangement of simple parts, aswill be hereinafter described.

- rlhe object of the invention is to provide a nut-lock that will beespecially simple in construction, economical, durable, and eflicient inoperation.

I am enabled to accomplish the objects of my invention by the simplemeans illustrated in the accompanying drawings, in which- Figure 1represents a perspective view of a bolt with my improved nut -lockapplied thereto. Fig. 2 is a central longitudinal section of the bolt,showing the same passing through asection of timber or metal, the nutand nut-lock being applied thereto. Fig. 3 is a perspective view of thelocking-washer; and Fig. 4. is a perspective view of the nut, looking atthe inner face thereof.

Referring to the drawings, the numeral l indicates a bolt, which is ofany ordinary construction and provided with the usual square orhexagonal head 2.

The numeral 3 indicates a section of timber, metal, or other materialthrough which the bolt passes, and the numeral 4 indicates thelocking-washer, which is provided upon its rear face with short spurs orprojections 5, which are adapted 'to enter perforations 6 in the metalor timber section 3, said spurs or projections being so located orpositioned upon the rear face of the locking-washer that when inposition in the perforations the said Washer will be prevented fromturning upon the bolt. The said washer is provided upon its front facewith curved grooves 'Z and circular shoulders 8, radiating from thecurved opening 9 in the center of said washer.

The numeral 10 indicates the nut, which is rabbeted or recessed on oneside thereof, as indicated by the numeral 11, and seated in said recessand rigidly secured to the nut is a spring-tongue 12, the free end ofwhich nor mally extends some distance above the surface of the rear faceof the nut. Said tongue is adapted to engage the curved shoulders on theface of the locking-washer when the nut is in position upon the bolt.

' By providing the curved shoulders 8 on the outer face of thelocking-washer said shoulders are disposed in a substantially tangentialrelation to the central opening in the washer and are thus brought intoproper relation to4 cooperate with the free end of the spring-dogorlocking-tongue 12. v Such c0nstruction also enablesthe tongue or dog12to be made of greater length, so that it may eX- tend nearly all theway across the inner face of the nut, adjacent to one of the flatwrenchengaging surfaces of said4 nut. This allows the tongue or dog tobe secured to the nut in a more substantial way and also provides alonger free end, which .renders the dog 0r tongue more reliable inoperation. The nut is also provided with a radially disposed groove orrecess13, which extends from one of the fiat sides of the nut inward toand com' municates with the recess in which the springtongue 12 ismounted. This enables a pointed instrument to be inserted in the recess13, so as to pry the free end of the tongue out of engagement with theshoulders 8 for the purpose of allowing the nut to be loosened andytaken oif the bolt.

It will be observed that the nut-lock herein described is especiallysimple in construction, and on Aaccount of the same being so simple I donot deem it necessary to describe the operation of the same, as itsoperation is apparent.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. In a nut-lock, the combination with a bolt, of a nut provided uponits inner surface with a recess, a spring tongue or dog mounted in saidrecess, and a locking-washer havn ing a central opening for the bolt andprovided With a plurality of curved shoulders disposed in asubstantially tangential relation to the central opening` of the washerand de signed to be engaged by the free end of said' tongue,substantially as described.

2. In a nut-lock, the combination with a IOO bolt, of a Washer having acentral opening for with its free end projecting across said later-4 thebolt and provided with a plurality of ally-extending groove,substantially as and curved shoulders disposed in a substantially forthe purpose specified. tangential relation to the central opening, a Intestimony whereof I have signed this 5 nut having in its inner face arecess extendspecification in the presence of two subscrib 15 ingsubstantiallyT parallel to one of the iiat ing Witnesses.

sides of the nut and having at one end a lat- JAMES B. MALCOM.wally-extending groove which leads from said Witnesses: recess outwardto the fiat side of the nut, and J. C. REID, Y

lo a spring tongue or dog lnounted in said recess S. I-I. HENDERSON.

